He also wants indoor swimming pools to reopen.
Ontario enters step two of its reopening ahead of schedule today, but some regions are already calling for fewer restrictions.
"Kids sports have been shut down for a long time and there is a safe way to allow kids sports again," Brown said. "I think it's important for children's mental health. I think it's important for their physical health."
The mayor also petitioned for indoor swimming pools to be reopened during step two, arguing the activity is low risk for COVID-19 transmission.
"I look at the data according to the World Health Organization, the COVID-19 virus does not transmit through the water while swimming," he added.
At the moment, the province's current guidelines do allow outdoor team sports, so long as players avoid physical contact.
"How do you have a kid's soccer game when they have to be nine feet apart? It means you'll be blowing the whistle literally every 10 seconds," Brown stated.